<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // 交换两个扣脚操作
        let tongue = '牛头'
        let toes = '亚索'
        let EQtowconnect;
        EQtowconnect = tongue;
        tongue = toes;
        toes = EQtowconnect;
        console.log(tongue, toes);
    </script>
</body>

</html>